Patent for a new and improved channel cleaner. This design "is to construct an apparatus which may be anchored in a channel where there are sand-bars, for the purpose of agitating the water and stirring up the sand, so that the current may remove it. [The] invention consists in a trunk or large tube perforated along the bottom and provided at one end with a flaring mouth for concentrating the current within the trunk; also, in the combination, with the trunk, of a stirrer and a motor-screw for driving the same" (lines 17-28).